To solve this problem, we need to break it down into parts based on the shop's charging scheme.

Charging Scheme:

1. First two hours: P20.00 per hour or fraction of an hour.
2. After the first two hours: P10.00 per hour or fraction of an hour.

Now, let's calculate the cost for each scenario.

(a) 40 minutes

• 40 minutes is less than 1 hour.
• Since it's within the first hour, the cost is P20.00.

Answer: You would pay P20.00.

(b) 3 hours

• The first 2 hours cost: $2 \times P20.00 = P40.00$
• The additional 1 hour (after 2 hours) costs: $1 \times P10.00 = P10.00$

Total Cost: $P40.00 + P10.00 = P50.00$

Answer: You would pay P50.00.

(c) 150 minutes

• 150 minutes is 2 hours and 30 minutes (or 2.5 hours).
• The first 2 hours cost: $2 \times P20.00 = P40.00$
• The additional 0.5 hour (after 2 hours) costs: $1 \times P10.00 = P10.00$

Total Cost: $P40.00 + P10.00 = P50.00$

Answer: You would pay P50.00.

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Would you like further details or have any questions?

Related Questions:

1. How much would you pay for using the computer for 1 hour and 15 minutes?
2. What would the cost be if you used the computer for 4 hours?
3. How much would it cost for 2 hours and 45 minutes?
4. What is the total cost for using the computer for 5 hours?
5. How much would it be for 90 minutes of computer usage?
6. What would be the cost if you used the computer for 6 hours?
7. How much would you pay for 1 hour and 55 minutes?
8. What is the cost for using the computer for 7 hours?

Tip:

When dealing with fractional hours in a pricing scheme, always remember to round up to the next full hour or portion of the hour, as the shop charges by the fraction of an hour.